West Columbia, SC has a population of 15,947 and is the 2,684th largest city in the United States. The population density is 1,870 per sq mi which is 1168% higher than the South Carolina average and 1964% higher than the national average. The median age in West Columbia is 38 which is approximately 1% lower than the South Carolina average of 39. In West Columbia, 47% of the population over 15 years of age are married, 87% speak English and 11% speak Spanish. 59% of West Columbia residents were born in South Carolina, 28% were born out of state, 1% were born outside of the United States and 11% were foreign born.